Properties of PVC-titania hybrid materials prepared by the sol-gel process

Asif, Khan M.; Sarwar, Muhammad Ilyas; Rafiq, S.; Ahmad, Zahoor

doi:10.1007/s002890050294

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…Many studies reported the effect of different inorganic fillers in the nano-scale on the polymer host properties. Poly(vinyl chloride) (PVC)/ inorganic nanocomposites based on silica, 2 calcium carbonate, 3 montmorillonite (MMT), 4 ,titania 6 and calcium carbonate 7,8 have been previously reported. As inorganic filler, carbon nanotube CNTs have many superior properties such as high aspect ratio, low weight, high thermal and electrical properties, and high elastic modulus.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the rheological, dynamic mechanical, and tensile properties of single‐walled carbon nanotubes reinforced poly(vinyl chloride)

Abu-Abdeen

2011

J of Applied Polymer Sci

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Polymer nanocomposites consisting of single-walled carbon nanotubes (SWCNTs) and poly(vinyl chloride) were prepared by casting technique. The complex viscosity increased with increasing SWCNTs content, and it had a percolation concentration threshold equal to 0.45 wt % of SWCNTs. The storage modulus, G 0 , increased with increasing either SWCNTs content or frequency. A gradual decrease in the terminal zone slope of G 0 for the nanocomposites with increasing SWCNTs content may be explained by the fact that the nanotube-nanotube interactions will be dominant at higher CNTs content, and lead to the formation of the interconnected or network-like structures of SWCNTs in the polymer nanocomposites. The rheological loss factor indicates two relaxation peaks at frequencies of 0.11 and 12.8 Hz due to the interaction between SWCNTs and polymer chains and glass transition, respectively. Dynamic mechanical properties were measured for the prepared composites. The results indicate that the storage modulus changes steadily, and the tand peaks are less intense for high SWCNTs content. Tensile tests were measured and depicted by an increase in the elastic modulus with increasing SWCNTs content, but it decreases for all composites as the testing temperature increased.

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Section: Introductionmentioning

confidence: 99%

Investigation of the rheological, dynamic mechanical, and tensile properties of single‐walled carbon nanotubes reinforced poly(vinyl chloride)

Abu-Abdeen

2011

J of Applied Polymer Sci

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“…The permeability characteristics of the films produced are examined. The in situ hydrolysis and condensation process has been shown [1] to be capable of producing a three dimensional crosslinked titania network homogeneously distributed in PVC. The nature of the network is controlled by solvent, pH and temperature.…”

Section: Introductionmentioning

confidence: 99%

Development of PVC/Silica Hybrids Using PVC Plastisols

Gilbert

Haghighat

Chua³

et al. 2006

Macromolecular Symposia

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Summary: A novel method for producing a plasticised PVC with increased porosity has been developed, by the use of an organic-inorganic hybrid. Silica was produced in situ from tetraethoxysilane via a hydrolytic sol-gel processing route. Tetrahydrofuran was used as co-solvent, and g-glycidyloxypropyl-trimethoxysilane as coupling agent. The films produced were transparent, with moderate mechanical properties. A film containing 20% silica showed a 45% increase in water vapour permeability.

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“…[1][2][3][4][5][6][7][8][9] The shift from the traditional blending of the reinforcing fillers into a polymeric matrix to the sol-gel process is due mostly to the subtle control over morphology of the growing inorganic phase in the polymer matrix by control of various reaction parameters like pH, concentration, temperature, etc. 34,35 The mechanical properties of such hybrids showed an increase in the Young's modulus, length at rupture, and toughness of the un-plasticized PVC. Thus, the inorganic-organic hybrids are usually optically transparent, even though microphase separation may exist.…”

Section: Introductionmentioning

confidence: 99%

Co‐poly(vinyl chloride‐vinyl acetate‐vinyl alcohol)‐silica nanocomposites from sol–gel process: Morphological, mechanical, and thermal investigations

Nadeem

Ahmad

Zulfiqar

et al. 2012

J of Applied Polymer Sci

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Organic-inorganic nanocomposites consisting of co-poly(vinyl chloride-vinyl acetate-vinyl alcohol) and silica were prepared via sol-gel process. Two types of hybrids were prepared, one in which interactions between hydroxyl group present in the copolymer chain and silanol groups of silica network were developed. In the second set, extensive chemical bonding between the phases was achieved through the reaction of hydroxyl groups on the copolymer chains with 3-isocyanatopropyltriethoxysilane (ICTS). Hydrolysis and condensation of tetraethoxysilane and pendant ethoxy groups on the chain yielded inorganic network structure. Mechanical and thermal behaviors of the hybrid films were studied. Increase in Young's modulus, tensile strength, and toughness was observed up to 2.5 wt % silica content relative to the neat copolymer. The system in which ICTS was employed as binding agent, the tensile strength and toughness of hybrid films increased significantly as compared to the pure copolymer. Thermogravimetric analysis showed that these nanocomposite materials were stable up to 250 C. The glass transition temperature increases up to 2.5 wt % addition of silica in both the systems. Field emission scanning electron microscope results revealed uniform distribution of silica in the copolymer matrix.

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Properties of PVC-titania hybrid materials prepared by the sol-gel process

Cited by 20 publications

References 6 publications

Investigation of the rheological, dynamic mechanical, and tensile properties of single‐walled carbon nanotubes reinforced poly(vinyl chloride)

Investigation of the rheological, dynamic mechanical, and tensile properties of single‐walled carbon nanotubes reinforced poly(vinyl chloride)

Development of PVC/Silica Hybrids Using PVC Plastisols

Co‐poly(vinyl chloride‐vinyl acetate‐vinyl alcohol)‐silica nanocomposites from sol–gel process: Morphological, mechanical, and thermal investigations

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